RT9052GE LED Driver Controller - Equivalent & Substitute Parts

Part Overview

The RT9052GE is an LED driver controller IC manufactured by Richtek USA Inc., designed for backlight applications with PWM dimming capability. This device operates as a DC-DC controller in a compact SOT-23-6 surface mount package. The RT9052GE is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. Substitute parts must maintain compatibility with the original supply voltage range (3.8V to 14.6V), PWM dimming functionality, single output configuration, and SOT-23-6 packaging to ensure direct replacement capability.

Substiute Parts

RT9052GE

Richtek USA Inc.In Stock: 976RT9052GE Datasheet

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RT9288AGE

Richtek USA Inc.In Stock: 22901RT9288AGE Datasheet

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HV9961LG-G

Microchip TechnologyIn Stock: 25822HV9961LG-G Datasheet

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IS31FL3190-UTLS2-TR

Lumissil MicrosystemsIn Stock: 700IS31FL3190-UTLS2-TR Datasheet

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LT3743EFE#PBF

Analog Devices Inc.In Stock: 2606LT3743EFE#PBF Datasheet

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LT3755IUD#PBF

Analog Devices Inc.In Stock: 948LT3755IUD#PBF Datasheet

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LT3791IFE#PBF

Analog Devices Inc.In Stock: 2233LT3791IFE#PBF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT9052GE are selected based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Single output DC-DC controller topology
• PWM dimming capability
• Supply voltage range overlap with 3.8V to 14.6V minimum requirement
• Surface mount packaging suitable for backlight applications
• ROHS3 compliance and MSL rating compatibility

Substitution Logic: The RT9052GE operates within a 3.8V to 14.6V supply range with PWM dimming for backlight control. Substitute parts are grouped by their ability to operate within overlapping voltage ranges and maintain PWM dimming functionality. Parts with extended voltage ranges (such as HV9961LG-G at 8V to 450V) are suitable for applications where the input voltage remains within the RT9052GE operating window. Parts with lower minimum voltage requirements (such as RT9288AGE at 3V) provide broader compatibility for low-voltage backlight systems. All substitutes maintain single-output, PWM-capable DC-DC controller architecture.

Parameter Comparison

Engineering Selection Recommendations

RT9288AGE is the primary substitute for direct replacement in existing backlight applications. This Richtek device maintains identical supply voltage range (3V to 14.6V), PWM dimming capability, SOT-23-6 packaging, and operating temperature specifications. The RT9288AGE is active in production with extensive inventory availability (22,852 pcs), ensuring supply continuity. The Step-Up (Boost) topology provides enhanced flexibility for low-voltage input scenarios.

HV9961LG-G (Microchip Technology) is suitable for applications requiring extended voltage range capability (8V to 450V). This part supports both analog and PWM dimming, expanding control options beyond the original PWM-only specification. The 8-SOIC package differs from the original SOT-23-6, requiring PCB layout modification. Operating temperature extends to 125°C, providing thermal margin for demanding backlight environments.

LT3755IUD#PBF (Analog Devices Inc.) offers multi-topology flexibility with Flyback, SEPIC, Step-Down (Buck), and Step-Up (Boost) configurations within a single device. Supply voltage range (4.5V to 40V) encompasses the RT9052GE operating window. Dual dimming modes (Analog and PWM) provide design flexibility. The 16-QFN package requires significant PCB redesign. MSL rating of 1 (Unlimited) exceeds original specifications.

LT3791IFE#PBF (Analog Devices Inc.) provides the widest supply voltage range (4.7V to 60V) with dual topology support (Step-Down and Step-Up). Output voltage capability (0V to 60V) enables diverse LED string configurations. The 38-TSSOP-EP package represents the largest footprint among substitutes, requiring substantial layout changes. Extended operating temperature (-40°C to 125°C) and MSL rating of 1 support high-reliability applications.

IS31FL3190-UTLS2-TR (Lumissil Microsystems) is not recommended for direct backlight replacement. This device operates at reduced supply voltage (2.7V to 5.5V), limiting compatibility with the original 3.8V minimum specification. I2C dimming control differs fundamentally from PWM-only operation, requiring firmware modification. The 9-UTQFN package is incompatible with SOT-23-6 footprints.

LT3743EFE#PBF (Analog Devices Inc.) is suitable for lighting applications requiring Step-Down (Buck) topology. Supply voltage range (6V to 36V) overlaps the upper portion of the RT9052GE window. PWM dimming maintains control compatibility. The 28-TSSOP-EP package requires PCB redesign. MSL rating of 1 and extended temperature range (-40°C to 125°C) provide enhanced reliability margins.

Frequently Asked Questions (FAQ)

Q: Can RT9288AGE directly replace RT9052GE without PCB modification?

A: Yes. RT9288AGE maintains identical SOT-23-6 packaging, supply voltage range (3V to 14.6V overlaps 3.8V to 14.6V), PWM dimming capability, and operating temperature specifications (-40°C to 85°C). No PCB layout changes are required for footprint compatibility.

Q: What is the primary difference between RT9052GE and RT9288AGE?

A: The RT9288AGE implements Step-Up (Boost) topology with 1MHz switching frequency, compared to the RT9052GE's unspecified topology. Both devices support PWM dimming for backlight applications and operate within compatible voltage ranges. The RT9288AGE is active in production with significantly higher inventory availability.

Q: Why is HV9961LG-G not a direct replacement despite PWM dimming support?

A: HV9961LG-G uses 8-SOIC packaging instead of SOT-23-6, requiring PCB footprint redesign. The minimum supply voltage (8V) exceeds the RT9052GE minimum (3.8V), limiting compatibility with low-voltage backlight systems. Step-Down (Buck) topology differs from the original device architecture.

Q: Can IS31FL3190-UTLS2-TR replace RT9052GE in backlight applications?

A: No. IS31FL3190-UTLS2-TR operates at 2.7V to 5.5V supply voltage, which does not meet the RT9052GE minimum of 3.8V. I2C dimming control requires firmware changes incompatible with PWM-only designs. This device targets mobile communications applications, not backlight control.

Q: What packaging considerations apply when selecting substitutes?

A: RT9288AGE maintains SOT-23-6 compatibility for direct replacement. HV9961LG-G (8-SOIC), LT3743EFE#PBF (28-TSSOP-EP), LT3755IUD#PBF (16-QFN), and LT3791IFE#PBF (38-TSSOP-EP) require PCB redesign. Package selection depends on available board space and thermal management requirements.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitutes maintain ROHS3 compliance, matching the original RT9052GE certification status. MSL ratings vary: RT9288AGE and HV9961LG-G maintain MSL 3 (168 Hours), while Analog Devices parts (LT3743EFE#PBF, LT3755IUD#PBF, LT3791IFE#PBF) provide MSL 1 (Unlimited) for enhanced moisture tolerance.

Q: Which substitute offers the best supply voltage compatibility?

A: RT9288AGE provides the closest voltage range match (3V to 14.6V) with identical upper limit and lower minimum than the original (3.8V to 14.6V). This ensures compatibility with existing power supply designs without modification.

Q: What topology differences exist among substitutes?

A: RT9052GE and RT9288AGE use unspecified topologies. HV9961LG-G implements Step-Down (Buck). LT3743EFE#PBF uses Step-Down (Buck). LT3755IUD#PBF supports multiple topologies (Flyback, SEPIC, Step-Down, Step-Up). LT3791IFE#PBF supports Step-Down and Step-Up. IS31FL3190-UTLS2-TR topology is unspecified. Topology selection depends on input and output voltage requirements.